Hyalorbilia Baral & G. Marson, Micologia 2000 (Trento): 44 (2001)

Index Fungorum number: IF 28404; Mycobank number: MB 28404

Hyalorbilia was introduced to accommodate five species which were removed from Orbilia based on the distinct morphological features(Baral and Marson 2000). The separated phylogenetic evidencebetween Orbilia and Hyalorbilia was provided by Liu et al. (Liu et al. 2006). Hyalorbilia berberidis was indicated as the type species and a total of 44 species were listed in MycoBank (2022). Hyalorbilia is characterized by pale-coloured and translucent apothecia, ectal excipulum cells horizontally oriented, hymenial surface covered with a layer of gelatinous elements and multiple warts, asci apex hemispheric with thin wall and arising from croziers and ascospore usually with a homopolar guttule. Hyalorbilia yunnanensis is described here based on the morphological illustration and phylogenetic evidence (Fig. 1).

Figure 1 – Maximum likelihood tree based on combined sequences (ITS=627 bp, tef1-α=542 bp and rpb2=822 bp, total 2038 characters, constant sites=900 bp, variable sites=1087 bp, parsimony informative sites=886) from 67 species of Orbiliaceae ematodetrapping fungi (including 59 Arthrobotrys species, 4 Dactylellina species and 4 Drechslerella species). The tree is rooted by Vermispora fusarina (YXJ13-5) and V. leguminacea (CGMCC 6.0291). The best-scoring maximum likelihood tree was performed with a final ML optimization likelihood value of − 6198.356892. Bootstrap support values for maximum likelihood (black) equal or greater than 70% and Bayesian posterior probabilities values (red) equal or greater than 0.90 are indicated above the nodes. The new isolates are in blue, type strains are in bold